Solution

Thermostat Calibration

NuoVolta provides a ready Thermostat Calibration solution for 9 ECUs, including Bosch MG1CS003, Bosch MEVD17.2.9 and Bosch MEVD17.2.5. Select your ECU below to see the details.

THERMOSTAT CALIBRATION

Many modern engines use an electronically controlled (map-controlled) thermostat. Instead of opening only at a fixed temperature, the thermostat is controlled by the engine control unit (ECU), which sets the target coolant temperature according to engine load, speed and ambient conditions. Typically, the engine runs warmer at part load for efficiency and cooler at high load to protect the engine.

With this module, thermostat-related calibration values in the ECU software, such as target coolant temperatures and thermostat control, are adjusted, and related DTCs are handled where needed.

FUNCTION OF THERMOSTAT

1. Warm-up:

The thermostat stays closed during warm-up so that the engine reaches its operating temperature quickly.

2. Temperature Control:

It regulates the coolant flow to the radiator and keeps the engine at the target temperature.

3. Map Control:

On electronically controlled thermostats, the ECU heats the thermostat element to open it earlier when a lower temperature is required.

PROBLEMS OF THERMOSTAT

Malfunction light coming on (Check Engine Light)
Thermostat or warm-up related DTCs (for example P0128 or P0597 to P0599)
The engine takes too long to reach operating temperature
High coolant temperature under heavy load
Fault codes after replacing a map-controlled thermostat with a conventional one

NUOVOLTA SOLUTION OF THERMOSTAT CALIBRATION

NuoVolta provides a ready solution for this module, applied by the NuoVolta client to the original ECU file.

Check the cooling system mechanically (coolant level, thermostat, water pump and radiator).
DTC codes should be read and removed with a diagnostic tool.
Apply the solution of the module related to NUOVOLTA.
Write the mod file to the ECU.
Check the dashboard, coolant temperature and DTC logs. Take it for a test drive.
If all the checks are OK, it means the problem is solved.

Note: Changes to the cooling strategy can affect fuel consumption, emissions and engine wear. The modification should be used responsibly and in compliance with local regulations.

ECUs supported for Thermostat Calibration

Grouped by ECU manufacturer, most requested first.

Bosch

DELCO

Siemens

Diagnose and repair real faults first. Removing or disabling emission systems is only permitted where allowed by law, for example for off-road or motorsport use.

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